Gearing



K. ALQUIST.

GEARING.

APPLICATION FILED IAN. Ie. ISIS.

Patented Mar. 16, 1920.

UNITED STATES PATENT OFFICE.

KARL ALQUIST, OF SCHENECTADY, NEW YORK.

GEARING.

Application le January 16, 1218.

To @ZZ Lo/wm t may concern.'

Be it known that I, KARL ALQUIs'r, a. subject of the King of Sweden,residing at Schenectac y. in the county of Schenectady,

' State of New York, have invented'certain new and useful Improvementsin Gearing, of which the following is a specification.

The present invention relates t0 gearing of the single reduction typewherein a pinion drives a low speed gear `wheel through two intermediategear wheels which transmit the load in parallel.l The pinion is usuallybalanced between theA two intermediate gear wheels, which in turn meshwith the driven gear wheel. Y

lIn a Vgearing of this type the strain on the teeth Aand the wear of thetooth surface is much greater between the pinion and the intermediategear wheels than' it is between the intermediate gear wheels and thelowspeed wheel. This is at once apparent from a consideration of thediameters of the respective wheels. Owing'to the small diameter of thepinion there is not 'the same extent of contacting surface between itand the` intermediate gear wheels that there is between the inte mediategear wheels and the low speed wheel, and also the teeth of the pinionare more carved. As a result the output of a gearmg of this type islimited to that which can be transmitted between the pinion and theintermediate gear wheels, while the teeth of the intermediate gearwheels engaging the low speed gear wheel could yeasily carry a muchlarger load both with reference to wear and strength of the teeth. Theresultis, therefore. that the pinion is the only member of the geartrain which is working to capacity. i

YIt is always desirable in a gearing that all parts, so far as possible,do the maximum .work of which they are capable; z'. e., that all'partsbe loaded to the same extent in regard to stresses, as this means thehighest output with the lowest weight. This is important, not only asconcerns the cost of manufacture, but also is often ofrprimaryimportance in connection with the use to which the gearing is to beput.v For example, in the ease of ship propulsion, it is very importantthat the gearing, well as the other machinery, 'be as light as possible.The object of the present invention is to provide an improved structureand arrangement in a gearing of the type referred to above wherein thegearing members will be Specification of Letters Patent.

Patented Mal'. 16, 1920.

sei-iai No. 212,029.

much more nearly loaded to the same extent, and for a consideration ofwhat believe to be novel and my invention, attention is directedto theaccompanying specification and the claims appended thereto.

1n the drawing, Figure 1 is a side yelevation of a gearing embodyingk myinvention, and Fig. Q is a diagrammatic end view thereof.

Referring to the drawing, the central portion of Fig. 1 shows the knownarrangement of this type of gearing wherein a pinion 5 carried by ashaft 6 drives a low speed gear wheel 7 located on ay shaft S, throughtwo intermediate gear wheels 9V and 10 carried by shafts 11 and 12respectively. lThe pinion y5 is balanced between the gear wheels 9 and10 and such gear wheels transmit the load in parallel from the pinion 5to the low speed gear wheel 7.

Now as alreadyv stated, the limiting inember as to output of such aknown type of y gearing is the pinion 5, the intermediate gear wheels 9and 1() being capable of transmitting a much greater load to the lowspeed wheel 7 than that whichV the pinion can transmit to them.According t0 my invention, therefore, l provide additional means forsupplying power directly vto the intermediate gear wheels 9 and 10independently of the pinion 5, and to this end I extend the yends of thepinion shaft 6 and mount thereon pinion members or parte 13, 13a, whichmesh with intermediate gear wheels or gear wheel parts 14, 14, and15,15a mounted on extensions of shafts 11 and`12 respectively. The shaftextensions may be an integral part off the shafts, as shown in the caseof shafts 11 and 12, or such extensions may vbe formed separately andcoupled to the shaft,

as shown in the case of the pinion shaft 6.v4

lilith this arrangement, it will be seen, additional power will betransmitted from shaft C, to intermediate gear wheels 9 and 10 by meansof the pinion members 13, laand gear wheel members 14, 14, 15, 15a, andas centhalves lof thepinion 5 and intermediate that Y gearing of theknown type r if) il gear wheels 9 and 10. Hor.' rer, it will beunderstood that l ain not limited to this ai'- rangement.

VTheinterniediate gear `wheels 9 andlOand the intermediate gear wheelparts 14,14%"15 and ll are shown as being of the flexible type inventedby ine which eoinprises'a plurality of plates or disks rigidly mountedon a suitable support and slightly spaced apart at their outer edges topermit of slight axial yielding under tooth pressures. Such a rear Ywheel is disclosed nin' ,Y d intenso. metisse, dated December 28, 1915,and ile l' prefer to use it, it to be understood that nig' in fentioiiis not liniitld thereto.V

The respective shafts G, 8, .11 and f ire provided .Y with suitablebearings lo', the shaft 6 being provided preferably with four snchbearings, and the remaining shafts Iwith two each, the intermediate gearwheelVV Y gear Wheel parts 111, 14a and 15, 15a are y Leral part '0f therie-i011 .5

Jv9 `and 10.

shown as being spaced some distance from the pinion `and intermediategear wheels' 9 and 10`to Vaccoinniodate bearings between them, the Vgearwheel parts 14:, 14%, 15 and 15.l being overhung on their respectiveshafts. It will beunderstood, however, that they need not be thus spacedapart, but may be brought closer together, if found desirable, and infact may be made as an inte- `A'piiiion ,drive,;as shown in Fig.

.l ,d 1, may vprovided on only one side yofthe gear wheel 7, or it maybe duplicated on the op- Ypiisite side, as indicated at. A and .B inFig.

This 'latter arrangement is found advantageoiis for example, in shippropulsion,

- wherev itv is desired yto utilize two vprime movers to drive .yasingle propeller shaft.

Yln,acoordance with the .provisions of the i'iatent l.,iies., l havedescribed the principle of operation of my invention, together I withthe apparatus which l'now considerA to represent Ythe best embodimentthereof;

I desire Fto have vit'understood that the apparatus shown Vis onlyillustrative andV other ineens. c

What I claim as new and desire to secure Letters :Patenty of the UnitedStates, is: I

i l. In combination, a high speed shaft, a

that the invention can be carried out byw Y low shaft, V,gearing throughwhich pinion.

and gear wheels which do not',

' wheel means.

yspeed d Y `lia-ving portions which inesh with the'teetli lof l,said lowspeedgear wheel and portions' wheel. means which mesh `directly withV,said pin* power is transmitted from one to they other, said gearingcomprising a pinion on the high speedshaft, a gear wheel on the lowspeed shaft, and a gear wheel which runs at a speed intermediate betweenthat of the two shafts, and meshes directli7 with the pinion Land rstnamed gear wheel, and

means for transmitting power from the high speed shaft directly to saidintermediate gear wheel independentl;v of said 2. In combination, a highspeed shaft. a low speed shaft, gearing through which power istransmitted from one tothe other`l said gearing comprising pinion lonthe high speed shaft, a gear wheel. on the low speed shaft, and a ,gearwheel which runs at a speed intermediate between .that of the ,twoshafts Vand meshes directlv with the pinion and first named gear wheel,,and additional gearing means which transmits power from said ,highspeed shaft to .said

said pinion. Y Y v A 3. The ycombination with ya gearing coinprising ashaft, a high speed pinion there on, a low `speed vgear wheel, and twointermediate gear Ywheels which mesh with the intermediate gear wheelindependently `of pinion and lowpspeed gear wheel and trans-Y mit powerfrom one ,to .the other, of means for supplyingy power from said Shaftto the intermediate gear wheels independently of said pinion.

The combination with a gearing come prising a shaft, a4 high speed:pinion theren on, a low speed gear wheel, and two intermediate gearwheels .which mesh with l,the pinion and low `speed gear wheel andtiaiis-V independent Vof the Vpinion for supplying additionalv power toboth the intermediate Y gear -iv heels.v

,In gearing, the combination of alow inieans shaving portions which meshidirectly with Vthe low Ispeed gear wheel and portions anda shaftrhaving pinion means thereon which ymesh directly with all the portionsof `said,interinediateV gear 6. ln a gearing, the combination of a lowgearwheel, flexible gear wheel means which are not inV mesh therewith,and pinion means which mesh directly with lsaid iieXible gear wheelmeans over their entire axial length. Y

7. In gearing, the combination of a shaft' carrying pinion means, a 'lowspeed gear and two intermediate gear Y wheel ion means and .said lowspeed gear wheel init-power freindV oneto the other, ofineans,

speed gear wheel, intermediate gear wheel and Vtransmit `the load inparallel from one tov theother, low speed gear wheel having a drivingface of less axial Width than that of the pinion means and intermediategear wheel means.

8. The combination with a gearing coinprising a shaft, a high speedpinion thereon, a low speed gear Wheel, and two shafts carryingintermediate gear wheels which mesh with the pinion and low speed gear.

Wheel and transmit power from one to the other, of meshing gear Wheelmembers mounted on extensions of said pinion and intermediate gea-rWheel shafts which serve te transmit power direetlg,T to said intermediate gear wheel independently of said Y, pinien.

9. The Combination with a gearing comprising a shaft, a high speedpinion thereon, a 10W vspeed gear Wheel, and two shafts carryingintermediate gear Wheels which mesh with the pinion and loir7 speed gearWheel and transmit power from one to the other, of meshing gear Wheelmembers mounted on extensions of, said pinion and intermediate gearwheel shafts which serve to transmit power directly to said intermediategear Wheels independently of said pinion, said intermediate gear Wheelsand the gear Wheel members mounted on the extensions of the intermediategear Wheel shafts being iexible.

In Witness whereof, I have hereunto set my hand this Mthvday of January,1918.

KARL ALQUIST.

